Question

a student uses four different tape - measures to estimate the length of a ruler manufactured to be exactly 1 foot long. which measurement is most accurate? a. 12 in b. 12.005 in c. 11.5 in d. 10 in

Explanation:

Step1: Understand the concept of accuracy

Accuracy refers to how close a measurement is to the true value. The true length of the ruler is 1 foot. Since 1 foot = 12 inches, we need to find which measurement is closest to 12 inches.

Step2: Calculate the absolute - error for each option

• For option A: The absolute error \(|12 - 12|=0\)
• For option B: The absolute error \(|12 - 12.005| = 0.005\)
• For option C: The absolute error \(|12-11.5|=0.5\)
• For option D: The absolute error \(|12 - 10|=2\)

Answer:

A. 12 in